In 2015, Mercedes-Benz introduced an all-new luxury compact crossover in the GLA-Class. It rides quite sportingly on the capable chassis found in the CLA sedan and draws its power from either a 208-horsepower turbocharged 2.0L 4-cylinder or, in the GLA45, a tuned version of the same 2.0L 4-cylinder that makes 375 horsepower. The engine is mated to a dual-clutch 7-speed automatic transmission with steering wheel-mounted paddle shifters, and power is delivered to all four wheels. Three driving modes include Sport, Manual and ECO, which can shut off the engine when the vehicle is stopped and rest...